<template>
  <div class="table">
    <div class="crumbs">
      <i class="el-icon-tickets"></i>歌单歌曲信息
    </div>
    <div class="container">
      <div class="handle-box">
        <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
        <el-input v-model="select_word" size="mini" placeholder="请输入歌曲名" class="handle-input"></el-input>
        <el-button type="primary" size="mini" @click="centerDialogVisible = true">添加歌曲</el-button>
      </div>
    </div>
    <el-table size="mini" ref="multipleTable" border style="width:100%" height="680px" :data="tableData"
              @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="40"></el-table-column>
      <el-table-column prop="name" label="歌手-歌名" align="center"></el-table-column>
      <el-table-column label="操作" width="150" align="center">
        <template slot-scope="scope">
          <el-button size="mini" type="danger" @click="handleDelete(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <el-dialog title="添加歌曲" :visible.sync="centerDialogVisible" width="400px" center>
      <el-form :model="registerForm" ref="registerForm" label-width="80px" action="" id="tf">
        <el-form-item prop="singerName" label="歌手名字" size="mini">
          <el-input v-model="registerForm.singerName" placeholder="歌手名字"></el-input>
        </el-form-item>
        <el-form-item prop="songName" label="歌曲名字" size="mini">
          <el-input v-model="registerForm.songName" placeholder="歌曲名字"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
                <el-button size="mini" @click="centerDialogVisible = false">取消</el-button>
                <el-button size="mini" @click="getSongId">确定</el-button>
            </span>
    </el-dialog>

    <el-dialog title="删除歌曲" :visible.sync="delVisible" width="300px" center>
      <div align="center">删除不可恢复，是否确定删除？</div>
      <span slot="footer">
                <el-button size="mini" @click="delVisible = false">取消</el-button>
                <el-button size="mini" @click="deleteRow">确定</el-button>
            </span>
    </el-dialog>
  </div>
</template>

<script>
  import {mixin} from '../mixins/index'
  import {listSongDetail, songOfSongId, songOfSongName, listSongAdd, delListSong} from '../api/index'

  export default {
    mixins: [mixin],
    data () {
      return {
        centerDialogVisible: false, //添加弹窗是否显示
        delVisible: false,          //删除弹窗是否显示
        registerForm: {      //添加框
          singerName: '',     //歌手名字
          songName: ''        //歌曲名字
        },
        tableData: [],
        tempData: [],
        select_word: '',
        idx: -1,          //当前选择项
        multipleSelection: [],   //哪些项已经打勾
        songListId: ''          //歌单id
      }
    },
    watch: {
      //搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
      select_word: function () {
        if (this.select_word === '') {
          this.tableData = this.tempData
        } else {
          this.tableData = []
          for (let item of this.tempData) {
            if (item.name.includes(this.select_word)) {
              this.tableData.push(item)
            }
          }
        }
      }
    },
    created () {
      this.songListId = this.$route.query.id
      this.getData()
    },
    methods: {
      //查询所有歌手
      getData () {
        this.tempData = []
        this.tableData = []
        listSongDetail(this.songListId).then(res => {
          for (let item of res) {
            this.getSong(item.songId)
          }
        })
      },
      //根据歌曲id查询歌曲对象，放到tempData和tableData里面
      getSong (id) {
        songOfSongId(id)
          .then(res => {
            this.tempData.push(res)
            this.tableData.push(res)
          })
          .catch(err => {
            console.log(err)
          })
      },
      //添加歌曲前的准备，获取到歌曲id
      getSongId () {
        let _this = this
        var songOfName = _this.registerForm.singerName + '-' + _this.registerForm.songName
        songOfSongName(songOfName).then(
          res => {
            _this.addSong(res[0].id)
          }
        )
      },
      //添加歌曲
      addSong (songId) {
        let _this = this
        let params = new URLSearchParams()
        params.append('songId', songId)
        params.append('songListId', this.songListId)

        listSongAdd(params)
          .then(res => {
            if (res.code === 1) {
              this.getData()
              this.notify('添加成功', 'success')
            } else {
              this.notify('添加失败', 'error')
            }
          })
          .catch(err => {
            console.log(err)
          })
        _this.centerDialogVisible = false
      },
      //删除一条歌曲
      deleteRow () {
        delListSong(this.idx, this.songListId)
          .then(res => {
            if (res) {
              this.getData()
              this.notify('删除成功', 'success')
            } else {
              this.notify('删除失败', 'error')
            }
          })
          .catch(err => {
            console.log(err)
          })
        this.delVisible = false
      }
    }
  }
</script>

<style scoped>
  .handle-box {
    margin-bottom: 20px;
  }

  .song-img {
    width: 100%;
    height: 80px;
    border-radius: 5px;
    margin-bottom: 5px;
    overflow: hidden;
  }

  .handle-input {
    width: 300px;
    display: inline-block;
  }

  .pagination {
    display: flex;
    justify-content: center;
  }

  .play {
    position: absolute;
    z-index: 100;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    top: 18px;
    left: 15px;
  }

  .icon {
    width: 2em;
    height: 2em;
    color: white;
    fill: currentColor;
    overflow: hidden;
  }
</style>
